| AAE | American Association of Engineers |
| ACI | American Concrete Institute |
| ACRI | Air Conditioning and Refrigeration Institute |
| A-E | Architect-engineer |
| AEC | American Engineering Council |
| AESC | American Engineering Standards Committee |
| AFFFA | American Forged Fitting and Flange Association |
| AIDD | American Institute of Design and Drafting |
| AIME | American Institute of Mechanical Engineers |
| AISC | American Institute of Steel Construction |
| AISE | Association of Iron and Steel Engineers |
| AISI | American Iron and Steel Institute |
| AMAA | Adhesives Manufacturers Association of America |
| AMCA | Air Moving and Conditioning Association |
| AMFIE | Association of Mutual Fire Insurance Engineers |
| AMICE | Associate Member of Institute of Civil Engineers |
| ANS | American Nuclear Society |
| ANSI | American National Standards Institute |
| API | American Petroleum Institute |
| ARI | Air Conditioning and Refrigeration Institute |
| ASBC | American Standard Building Code |
| ASCE | American Society of Civil Engineers |
| ASCEA | American Society of Civil Engineers and Architects |
| ASCHE | American Society of Chemical Engineers |
| ASE | Amalgamated Society of Engineers |
| ASEA | American Society of Engineers and Architects |
| ASEE | American Society of Engineering Education |
| ASHACE | American Society of Heating and Air-Conditioning Engineers |
| ASHRAE | American Society of Heating, Refrigerating and Air-Conditioning Engineers |
| ASME | American Society of Mechanical Engineers |
| ASNE | American Society of Naval Engineers |
| ASRE | American Society of Refrigeration Engineers |
| ASSE | American Society of Safety Engineers |
| ASTM | American Society for Testing and Materials |
| ASWG | American steel and wire gauge |
| AWG | American wire gauge |
| AWS | American Welding Society |
| AWWA | American Water Works Association |
| BHN | Brinell hardness number |
| CAD | Computer-aided design |
| CADD | Computer-aided design drafting |
| db | Dry bulb |
| DCCP | Design change control program |
| DCEA | Directory of Civil Engineering Abbreviations |
| DCN | Design/drawing change notice |
| DIN | Deutsches Institu fu¨r Normung; German Standards Institute |
| DIPRA | Ductile Iron Pipe Research Association DIS Ductile Iron Society |
| EJMA | Expansion Joint Manufacturers Association |
| FCI | Fluid Controls Institute |
| FMA | Forging Manufacturers Association |
| gpm | Gallons per minute |
| gps | Gallons per second |
| HI | Hydraulic Institute |
| HVAC | Heating, ventilating, and air conditioning |
| IAEE | International Association of Earthquake Engineers |
| IFHTM | International Federation for the Heat Treatment of Materials |
| IFI | Industrial Fasteners Institute |
| IGSCC | Intergranular stress corrosion cracking |
| ISA | International Standards Association; Instrument Society of America |
| NACE | National Association of Corrosion Engineers |
| NAPE | National Association of Power Engineers |
| NASE | National Association of Stationary Engineers |
| NASPD | National Association of Steel Pipe Distributors |
| NCPI | National Clay Pipe Institute |
| NFPA | National Fire Protection Association |
| NIMA | National Insulation Manufacturers Association |
| NPT | National Pipe Taper |
| NSPE | National Society of Professional Engineers |
| NSSS | Nuclear steam system supplier |
| OBE | Operating-basis earthquake |
| OSHA | Occupational Safety and Health Act, or Administration |
| PACE | Professional Association of Consulting Engineers |
| PFI | Pipe Fabrication Institute |
| PJA | Pipe Jacking Association |
| PLCA | Pipe Line Contractors Association |
| ppb | Parts per billion |
| PFMA | Pipe Fittings Manufacturers Association |
| PPI | Plastic Pipe Institute |
| ppm | Parts per million |
| PPMS | Plastic Pipe Manufacturers’ Society |
| PRI | Plastics and Rubber Institute |
| RWMA | Resistance Welding Manufacturers’ Association |
| SAE | Society of Automotive Engineers |
| SCC | Stress corrosion cracking |
| SMA | Solder Markers’ Association; Steel Manufacturers’ Association |
| VMA | Valve Manufacturers’ Association |
